ARM: dts: msm: Add sched energy data for msm8937

Energy Aware Scheduler is enabled for MSM8937. Provide the
energy-model for the scheduler to use energy aware task placement.
Add efficiency number for msm8937.

CRs-Fixed: 2195741

Change-Id: If1c39222042572f1dcaa38e53712914d47989728
Signed-off-by: blong <blong@codeaurora.org>